Some jokes are so multi-layered, it is hard to tell what the punchline is.
The Gregory Brothers, know for their hilarious series Auto-Tune the News, switch “Black Widow” from a minor chord to major, which would be funny enough. But the video also adds in bluegrass as the genre of choice.
And they play it on a porch, because that is where you play bluegrass, duh.
A stomp or a clap might have been a nice touch. Just sayin’.